java在线考试系统编程实例

很抱歉，根据提供的引用内容，没有提供具体的Java在线考试系统的编程实例。但是，我可以为您提供一个基本的Java在线考试系统的编程框架，供您参考：

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

class Question {
    private String question;
    private List<String> options;
    private int correctOption;

    public Question(String question, List<String> options, int correctOption) {
        this.question = question;
        this.options = options;
        this.correctOption = correctOption;
    }

    public String getQuestion() {
        return question;
    }

    public List<String> getOptions() {
        return options;
    }

    public int getCorrectOption() {
        return correctOption;
    }
}

class Exam {
    private List<Question> questions;

    public Exam(List<Question> questions) {
        this.questions = questions;
    }

    public void startExam() {
        int score = 0;
        Scanner scanner = new Scanner(System.in);

        for (int i = 0; i < questions.size(); i++) {
            Question question = questions.get(i);
            System.out.println("Question " + (i + 1) + ": " + question.getQuestion());
            List<String> options = question.getOptions();
            for (int j = 0; j < options.size(); j++) {
                System.out.println((j + 1) + ". " + options.get(j));
            }
            System.out.print("Enter your answer: ");
            int answer = scanner.nextInt();

            if (answer == question.getCorrectOption()) {
                score++;
            }
        }

        System.out.println("Your score: " + score + "/" + questions.size());
    }
}

public class OnlineExamSystem {
    public static void main(String[] args) {
        List<Question> questions = new ArrayList<>();
        questions.add(new Question("What is the capital of France?", List.of("London", "Paris", "Berlin", "Madrid"), 2));
        questions.add(new Question("What is the largest planet in our solar system?", List.of("Mars", "Jupiter", "Earth", "Saturn"), 2));
        questions.add(new Question("What is the chemical symbol for gold?", List.of("Au", "Ag", "Fe", "Cu"), 1));

        Exam exam = new Exam(questions);
        exam.startExam();
    }
}

这是一个简单的Java在线考试系统的编程示例。它包括了问题类（Question）和考试类（Exam），并在主类（OnlineExamSystem）中创建了一些问题并开始考试。您可以根据自己的需求进行扩展和修改。